ref: 0e21daeb990191793cea556ab63fd68e7b3b48ec dir: /test/t.match1/
NF > 0 && match($NF, $1) { print $0, RSTART, RLENGTH if (RLENGTH != length($1)) printf "match error at %d: %d %d\n", NR, RLENGTH, RSTART >"/dev/tty" }